$OpenBSD: patch-gk_cxx,v 1.5 2017/05/19 22:55:35 espie Exp $

Index: gk.cxx
--- gk.cxx.orig
+++ gk.cxx
@@ -22,6 +22,7 @@
 #include <sys/resource.h>
 #include <sys/mman.h>
 #endif
+#include <unistd.h>
 #include <h225.h>
 #include "h323util.h"
 #include "Toolkit.h"
